feat(iit): Complete V3.1 QC engine + GCP business reports + AI timeline + bug fixes

V3.1 QC Engine:
- QcExecutor unified entry + D1-D7 dimension engines + three-level aggregation
- HealthScoreEngine + CompletenessEngine + ProtocolDeviationEngine + QcAggregator
- B4 flexible cron scheduling (project-level cronExpression + pg-boss dispatcher)
- Prisma migrations for qc_field_status, event_status, project_stats

GCP Business Reports (Phase A - 4 reports):
- D1 Eligibility: record_summary full list + qc_field_status D1 overlay
- D2 Completeness: data entry rate and missing rate aggregation
- D3/D4 Query Tracking: severity distribution from qc_field_status
- D6 Protocol Deviation: D6 dimension filtering
- 4 frontend table components + ReportsPage 5-tab restructure

AI Timeline Enhancement:
- SkillRunner outputs totalRules (33 actual rules vs 1 skill)
- iitQcCockpitController severity mapping fix (critical->red, warning->yellow)
- AiStreamPage expandable issue detail table with Chinese labels
- Event label localization (eventLabel from backend)

Business-side One-click Batch QC:
- DashboardPage batch QC button with SyncOutlined icon
- Auto-refresh QcReport cache after batch execution

Bug Fixes:
- dimension_code -> rule_category in 4 SQL queries
- D1 eligibility data source: record_summary full + qc_field_status overlay
- Timezone UTC -> Asia/Shanghai (QcReportService toBeijingTime helper)
- Pass rate calculation: passed/totalEvents instead of passed/totalRecords

Docs:
- Update IIT module status with GCP reports and bug fix milestones
- Update system status doc v6.6 with IIT progress

Tested: Backend compiles, frontend linter clean, batch QC verified
Made-with: Cursor

frontend-v2/src/modules/admin/components/qc-cockpit/RiskHeatmap.tsx

@@ -1,7 +1,7 @@
 /**
- * 风险热力图组件
+ * 风险热力图组件 (V3.1)
  * 
- * 展示受试者 × 表单/访视 矩阵
+ * 展示受试者 × 事件 矩阵
  * - 绿色圆点：通过
  * - 黄色图标：警告（可点击）
  * - 红色图标：严重（可点击）
@@ -11,7 +11,6 @@
 import React from 'react';
 import { Spin, Tag, Tooltip } from 'antd';
 import {
-  CheckOutlined,
   ExclamationOutlined,
   CloseOutlined,
 } from '@ant-design/icons';
@@ -24,6 +23,8 @@ interface RiskHeatmapProps {
 }
 
 const RiskHeatmap: React.FC<RiskHeatmapProps> = ({ data, onCellClick, loading }) => {
+  const columnLabels = data.columnLabels || {};
+
   const getStatusTag = (status: string) => {
     switch (status) {
       case 'enrolled':
@@ -39,13 +40,16 @@ const RiskHeatmap: React.FC<RiskHeatmapProps> = ({ data, onCellClick, loading })
     }
   };
 
+  const getColumnLabel = (col: string): string => {
+    if (columnLabels[col]) return columnLabels[col];
+    if (col.includes('(')) return col.split('(')[0];
+    return col;
+  };
+
   const renderCell = (cell: HeatmapCell) => {
     const hasIssues = cell.status === 'warning' || cell.status === 'fail';
-    
-    // ✅ 所有单元格都可点击，便于查看详情
     const handleClick = () => onCellClick(cell);
     
-    // 有问题的单元格：显示可点击图标
     if (hasIssues) {
       const iconClass = `qc-heatmap-cell-icon ${cell.status}`;
       const icon = cell.status === 'fail' 
@@ -61,7 +65,6 @@ const RiskHeatmap: React.FC<RiskHeatmapProps> = ({ data, onCellClick, loading })
       );
     }
     
-    // 通过或待检查：显示小圆点（也可点击）
     const dotClass = `qc-heatmap-cell-dot ${cell.status === 'pass' ? 'pass' : 'pending'}`;
     const tooltipText = cell.status === 'pass' 
       ? '已通过，点击查看数据' 
@@ -83,7 +86,6 @@ const RiskHeatmap: React.FC<RiskHeatmapProps> = ({ data, onCellClick, loading })
 
   return (
     <div className="qc-heatmap">
-      {/* 头部 */}
       <div className="qc-heatmap-header">
         <h3 className="qc-heatmap-title">受试者风险全景图 (Risk Heatmap)</h3>
         <div className="qc-heatmap-legend">
@@ -106,7 +108,6 @@ const RiskHeatmap: React.FC<RiskHeatmapProps> = ({ data, onCellClick, loading })
         </div>
       </div>
 
-      {/* 表格内容 */}
       <div className="qc-heatmap-body">
         <Spin spinning={loading}>
           <table className="qc-heatmap-table">
@@ -114,14 +115,16 @@ const RiskHeatmap: React.FC<RiskHeatmapProps> = ({ data, onCellClick, loading })
               <tr>
                 <th className="subject-header">受试者 ID</th>
                 <th>入组状态</th>
-                {data.columns.map((col, idx) => (
-                  <th key={idx}>
-                    {col.split('(')[0]}<br />
-                    <small style={{ fontWeight: 'normal' }}>
-                      {col.includes('(') ? `(${col.split('(')[1]}` : ''}
-                    </small>
-                  </th>
-                ))}
+                {data.columns.map((col, idx) => {
+                  const label = getColumnLabel(col);
+                  return (
+                    <th key={idx}>
+                      <Tooltip title={col !== label ? col : undefined}>
+                        <span>{label}</span>
+                      </Tooltip>
+                    </th>
+                  );
+                })}
               </tr>
             </thead>
             <tbody>